单击列表时，我将一些值从一个片段传递到另一个片段。当我选择说第0个项目时，我正在获取正确行的Toast消息，但是正在向另一个片段发送错误的值。另外有时会发送一个空值。根据我的代码，我认为问题可能与列表有关，但与json数据有关。这是我的列表视图代码。
public void showJson(String json){
final Context billsctx = getActivity();
ParseBills pb = new ParseBills(json);
pb.parseJSON();
BillsCustomList bl = new BillsCustomList((Activity)billsctx,ParseBills.custInfo,ParseBills.invoiceNo,ParseBills.barcode,ParseBills.description,ParseBills.weight,
ParseBills.rate,ParseBills.makingAmt,ParseBills.net_rate,ParseBills.itemTotal,ParseBills.vat,ParseBills.sum_total,ParseBills.bill_type,ParseBills.date);
all_listView.setAdapter(bl);
all_listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
//displaytext.setText(ParseBills.invoiceNo[position]);
// Setting Values for next screen
Object obj = all_listView.getItemAtPosition(position);
int pos = all_listView.getPositionForView(view);
Toast.makeText(getContext(), "This is the object position "+pos, Toast.LENGTH_LONG).show();
InvoiceNo = String.valueOf(ParseBills.invoiceNo[pos]);
invoiceDate = ParseBills.date[pos];
custInfo = ParseBills.custInfo[pos];
itemVat = ParseBills.vat[pos];
itemSum = ParseBills.sum_total[pos];
billType = ParseBills.bill_type[pos];
Fragment fragment = new View_InvestFragment();
FragmentManager fragmentMg = getActivity().getSupportFragmentManager();
FragmentTransaction fragmentTrans = fragmentMg.beginTransaction();
Bundle args = new Bundle();
args.putString("INVOICENO",InvoiceNo);
args.putString("INVOICEDATE",invoiceDate);
args.putString("CUSTINFO",custInfo);
args.putString("ITEMVAT",itemVat);
args.putString("ITEMSUM",itemSum);
args.putString("BILLTYPE",billType);
fragment.setArguments(args);
fragmentTrans.replace(R.id.container_body, fragment,"TABFRAGMENT1");
fragmentTrans.addToBackStack(null);
fragmentTrans.commit();
}
} );
我认为json对象中的值不断移动。就像一个实例的第0个值将是另一个实例的第一个值。这是我的json代码。
public class ParseBills
{
public static String[] custInfo;
public static String[] invoiceNo;
public static String[] barcode;
public static String[] description;
public static String[] weight;
public static String[] rate;
public static String[] makingAmt;
public static String[] net_rate;
public static String[] itemTotal;
public static String[] vat;
public static String[] sum_total;
public static String[] bill_type;
public static String[] date;
public static final String JSON_ARRAY ="result";
public static final String KEY_CUSTINFO ="custInfo";
public static final String KEY_INVOICENO ="invoiceNo";
public static final String KEY_BARCODE ="barcode";
public static final String KEY_DESC ="description";
public static final String KEY_WEIGHT ="weight";
public static final String KEY_RATE ="rate";
public static final String KEY_MAKING ="makingAmt";
public static final String KEY_NRATE ="net_rate";
public static final String KEY_TOTAL ="itemTotal";
public static final String KEY_VAT ="vat";
public static final String KEY_SUM ="sum_total";
public static final String KEY_TYPE ="bill_type";
public static final String KEY_DATE ="date";
private JSONArray bills = null;
private String json;
public ParseBills(String json){
this.json = json;
}
public void parseJSON(){
JSONObject jsonObject=null;
try {
jsonObject = new JSONObject(json);
bills = jsonObject.getJSONArray(JSON_ARRAY);
custInfo = new String[bills.length()];
invoiceNo = new String[bills.length()];
barcode = new String[bills.length()];
description = new String[bills.length()];
weight = new String[bills.length()];
rate = new String[bills.length()];
makingAmt = new String[bills.length()];
net_rate = new String[bills.length()];
itemTotal = new String[bills.length()];
vat = new String[bills.length()];
sum_total = new String[bills.length()];
bill_type = new String[bills.length()];
date = new String[bills.length()];
for(int i=0;i<bills.length();i++){
JSONObject jo = bills.getJSONObject(i);
custInfo[i] = jo.getString(KEY_CUSTINFO);
invoiceNo[i] = jo.getString(KEY_INVOICENO);
barcode[i] = jo.getString(KEY_BARCODE);
description[i] = jo.getString(KEY_DESC);
weight[i] = jo.getString(KEY_WEIGHT);
rate[i] = jo.getString(KEY_RATE);
makingAmt[i] = jo.getString(KEY_MAKING);
net_rate[i] = jo.getString(KEY_NRATE);
itemTotal[i] = jo.getString(KEY_TOTAL);
vat[i] = jo.getString(KEY_VAT);
sum_total[i] = jo.getString(KEY_SUM);
bill_type[i] = jo.getString(KEY_TYPE);
date[i] = jo.getString(KEY_DATE);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}
以下是接收另一个片段中的值的代码。
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
setHasOptionsMenu(true);
View viewInvest = inflater.inflate(R.layout.view_invest, container, false);
String invNo = getArguments().getString("INVOICENO");
String invDate = getArguments().getString("INVOICEDATE");
String custInfo = getArguments().getString("CUSTINFO");
String inVat = getArguments().getString("ITEMVAT");
String inSum = getArguments().getString("ITEMSUM");
String type = getArguments().getString("BILLTYPE");
try {
if (invNo == null)
{
Toast.makeText(getContext(), "This is a wrong value being sent "+invNo, Toast.LENGTH_LONG).show();
}else {
sendInvoiceNum(invNo);
}
} catch (JSONException e) {
e.printStackTrace();
}
tv_invoiceNo = (TextView) viewInvest.findViewById(R.id.tv_invoiceNo);
tv_invoicedate = (TextView) viewInvest.findViewById(R.id.tv_invDate);
tv_custInfo = (TextView) viewInvest.findViewById(R.id.tv_invName);
tv_vat = (TextView) viewInvest.findViewById(R.id.tv_invVat);
tv_sum = (TextView) viewInvest.findViewById(R.id.tv_invoiceSum);
inv_listView = (ListView) viewInvest.findViewById(R.id.invest_listView);
tv_invoiceNo.setText(invNo);
tv_invoicedate.setText(invDate);
tv_custInfo.setText(custInfo);
tv_vat.setText(inVat);
tv_sum.setText(inSum);
return viewInvest;
}
这是我发送请求的Volley代码
public void sendInvoiceNum(final String invNumber) throws JSONException {
final Context context = getActivity();
StringRequest stringRequest = new StringRequest(Request.Method.POST, INVOICE_URL,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
//Toast.makeText(context, response, Toast.LENGTH_LONG).show();
showInvoice(response);
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(context, error.toString(), Toast.LENGTH_SHORT).show();
}
}) {
@Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String, String> params = new HashMap<>();
params.put(KEY_INVOICE, invNumber);
return params;
}
};
RequestQueue rq = Volley.newRequestQueue(context);
rq.add(stringRequest);
}
public void showInvoice(String json) {
final Context context = getActivity();
ParseInvoice pi = new ParseInvoice(json);
pi.parseInvoice();
InvoiceDetailsList idl = new InvoiceDetailsList((Activity) context, ParseInvoice.barcode, ParseInvoice.description, ParseInvoice.weight, ParseInvoice.rate, ParseInvoice.makingAmt
, ParseInvoice.net_rate, ParseInvoice.itemTotal);
final String[] barcodes = ParseInvoice.barcode;
// Toast.makeText(context, String.valueOf(barcodes[0]), Toast.LENGTH_LONG).show();
inv_listView.setAdapter(idl);
}
答案 0 :(得分：0)
单击时不使用此语句检索视图项的位置：
int pos = all_listView.getPositionForView(view);
只需使用OnItemClick（）生成的变量“int position”来检索单击的视图项的位置。